cd4 {timereg}R Documentation

The multicenter AIDS cohort study

Description

CD4 counts collected over time.

Format

This data frame contains the following columns:

obs
a numeric vector. Number of observations.
id
a numeric vector. Id of subject.
visit
a numeric vector. Timings of the visits in years.
smoke
a numeric vector code. 0: non-smoker, 1: smoker.
age
a numeric vector. Age of the patient at the start of the trial.
cd4
a numeric vector. CD4 percentage at the current visit.
cd4.prev
a numeric vector. CD4 level at the preceding visit.
precd4
a numeric vector. Post-infection CD4 percentage.
lt
a numeric vector. Gives the starting time for the time-intervals.
rt
a numeric vector. Gives the stopping time for the time-interval.

Source

MACS Public Use Data Set Release PO4 (1984-1991). See reference.

References

Kaslow et al. (1987), The multicenter AIDS cohort study: rational, organisation and selected characteristics of the participants. Am. J. Epidemiology 126, 310–318.

Examples

data(cd4)
names(cd4)

[Package timereg version 1.1-7 Index]